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Yamaguchi, Japan

Tokuyama Corporation

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USPTO Granted Patents = 531

% Expired Patents = 26.9

CIPO Patents = 8

EPO Patents = 212

Trademarks = 40

Forward Citations = 2,148

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591 inventors (with patents filed for the assignee):

Junji Momoda (68 out of 68 patents)

Katsuhiro Mori (37 out of 37 patents)

Junji Takenaka (33 out of 33 patents)

4. Shinobu Izumi (20 out of 20 patents)

5. Yukihiro Kanechika (19 out of 19 patents)

6. Hironobu Nagoh (19 out of 19 patents)

7. Takafumi Shimoda (18 out of 18 patents)

8. Takayuki Negishi (18 out of 18 patents)

9. Kenji Fukuta (18 out of 24 patents)

10. Yasutomo Shimizu (17 out of 17 patents)

11. Kentaro Fukuda (17 out of 17 patents)

12. Yuki Kikkawa (16 out of 16 patents)

13. Hiroyuki Yanagi (15 out of 15 patents)

14. Yasuyuki Yamamoto (15 out of 15 patents)

15. Toru Nagashima (14 out of 14 patents)

Core Competencies:

Semiconductor Wafer

Silicon Etching

Treatment Liquid

Optical Materials

Curable Composition

Polycrystalline Silicon

Photochromic Compound

Silica Powder

Aluminum Nitride

Hexagonal Boron Nitride

Chemical Treatment

Cement Clinker

531 patents: Sort by Forward Citations

1. 12774146 - Packaging bag for filling crushed polysilicon material and polysilicon package (2026-10-27),

2. 12760223 - Silicon etching solution and method for producing silicon etching solution, method for treating substrate, and method for producing silicon device (2026-10-13),

3. 12741925 - Inhibitor for RuOgas generation and method for inhibiting RuOgas generation (2026-09-22),

4. 12699208 - Photochromic compound, photochromic curable composition, cured body, lens and eyeglasses (2026-08-04),

5. 12637356 - Hexagonal boron nitride powder and method for producing the same (2026-05-26),

6. 12628593 - Method for treating transition metal semiconductor, and reducing agent-containing treatment liquid for transition metal oxide (2026-05-12),

7. 12624048 - Photochromic cyclic compound and curable composition containing the photochromic cyclic compound (2026-05-12),

8. 12617949 - Silica, paint and silica manufacturing method (2026-05-05),

9. 12612580 - Treatment liquid for semiconductor wafers, which contains hypochlorite ions (2026-04-28),

10. 12610461 - Laminate for circuit board (2026-04-21),

11. 12609210 - Curable composition and cured body of same (2026-04-21),

12. 12595408 - Photochromic compound, naphthol derivative, curable composition, optical article, lens, and eyeglasses (2026-04-07),

13. 12595182 - Method for producing chemical-treated metal oxide powder (2026-04-07),

14. 12577465 - Method for producing semiconductor treatment liquid and method for producing semiconductor element (2026-03-17),

15. 12577107 - Silicon nitride powder for sintering (2026-03-17),

Company Overview

Tokuyama Corporation, headquartered in Yamaguchi, Japan, specializes in semiconductor processing technologies. The company is known for its development and manufacturing of semiconductor wafers, silicon etching solutions, and treatment liquids. Tokuyama also focuses on optical materials, curable compositions, and polycrystalline silicon, contributing to advancements in various high-tech applications. With a commitment to innovation, Tokuyama plays a significant role in the semiconductor industry, providing essential materials and technologies that support modern electronics.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 3 2026

531 Patents

#2 in Yamaguchi

#366 in Japan

#1,833 in the World

Yamaguchi, Japan

Tokuyama Corporation

Forward Citations = 2,148

591 inventors:

Junji Momoda (68 out of 68 patents)

Katsuhiro Mori (37 out of 37 patents)

Junji Takenaka (33 out of 33 patents)

4. Shinobu Izumi (20 out of 20 patents)

5. Yukihiro Kanechika (19 out of 19 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tokuyama Corporation. Retrieved from https://idiyas.com/company/tokuyama

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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